Ring securing means



May 18, 1937. w. M. CHARMAN RING SECURING MEANS Original Filed July 21, 1933 INVENTOR. I W/u' rse MCHAPMAN .7L/m

Patented May 18, 1937 UNITED STATES RING SECURING MEANS Walter M. Charman, Cleveland Heights, Ohio original application July 21, 1933, serial N0.

681,541. Divided and this application November 15, 1935, Serial No. 49,935. In Canada May 6 Claims.

This invention relates to ring securing means.

It has to do with hot tops for ingot molds of the type in which the refractory, heat insulating material of the hot top is mounted within a metal y casing, in other words forms a lining for the casing. In certain hot tops of this character the casing is formed with an internal ledge which supports the principal part of the refractory lining, while a lower lining element in the form 19 of a ring is releasably attached to the casing, this ring serving to protect the lower and inner sides of the ledge.. A lining ring of this general character is disclosed in U. S. Patent 1,956,895,

issued May 1, 1934 to Philip R. Ward and myself. The ring is also disclosed more or less in detail in my copending application Serial No. 681,541,

filed July 21, 1933, of which the present application is a division.

This ring is held in place releasably by spring clips of special design which are covered in Patent 1,949,292, issued February 27, 1934 to Gustave A. Peterson and myself. The. present invention relates to renewable socket members mounted in the casing for cooperation with these clips. y

The principal object of the invention is the provision of means for insuring a good anchorage for the clips in the casing at all times, even after the latter has been in use for a long period.

Another object is the provision of a socket member of `such character that it may be removed and a new one readily inserted in its place.

In the drawing the single figure is a vertical o sectional detail View of a fragment of a hot top, showing a bottom ring mounted on the casing by fastening means utilizing the present invention.

In the drawing, I0 represents the metal casing of a composite hot top. At its lower end this casing is provided with an internal or inwardly projecting ledge Il, which supports the semi permanent upper lining I2. Thel bottom of the hot top is recessed, as indicated at I3, for the reception of a sheet metal wiper strip I4 which projects beyond the perimeter of the hot top. This wiper strip is resilient and wipes against the inner surface of the ingot mold when the hot top is lowered thereinto in a manner which is well known in the art and disclosed more or less in detail in Patent 1,804,207, issued May 5, 1931 to Harry J. Darlington and myself.

The ledge II is protected on its inner and bottom surfaces by a refractory bottom ring I5 preferably, although not necessarily, made in one piece. This ring is used for one heat only. It

remains upon the ingot when the hot top is stripped therefrom. Hence it must be attached to the hot top by means which will yieldor fail when the stripping occurs, but which will hold the ring against accidental displacement during the -5 handling of the hot` top and during the pouring of the metal.

The ring I5 is provided on its inner side with a series of shallow pockets I6. These pockets cooperate with spring Wire clips I'I that have rebent ends I8 adapted to lextend into the pockets. The clips extend downwardly from the ends I8 along the inner sides of the ring, outwardly along the bottom surface of the ring, and upwardlyr along the outer surface thereof, through slots 9 formed in the wiper strip I4, and upwardly along the outer surface of the casing I0. 1

The outer extremity of the clip is turned inwardly at I8, and is caused to engage a renewable socket member I9 which is made hollow to receive the end of the clip, and is provided with a head 20 to abut against a shoulder 2| formed in the opening made in the casing to 'receive the socket member. At the inner side of the casing there is a shallow countersink within which vrests a washer 22 over which the inner end of the hollow socket member is rolled or peened, whereby the socket member is fixed in place. This fastening at the inner end of the socket member is covered normally by the lining I2, so that there is no danger of its becoming loosened accidentally. It Will be noted that the bore of the socket member is somewhat restricted at its outer end, so that the hooked end of the clip tends to engage behind the shoulder produced by the junction of the two bore portions of different diameters.

When the socket member becomes worn to such an extent that it does not readily hold the end of a clip, it may be removed and a new one inserted. If this is done whenever the upper lining I2 of 40 the hot top is replaced, the socket members will always be in good condition. p

The casing I0 is usually formed of cast iron. The socket member I9 is formed preferably of a malleable metal, and therefore, in addition to being removable and replaceable, withstands wear better than the cast iron could do. After an ingot is poured and the metal has solidified, the hot top is stripped from the ingot. The ring I5 sticks to the ingot. The wire from which the clip I'I is formed is softened considerably by the heat of the ingot. Hence, when lifting force is exerted on the hot top either the wire parts or the ends I8 pull out of the sockets I9.

' The outer surface of the socket member I9 is circular. Consequently it may be turned about its axis. This may occur merely as an incident to the use of the device, resulting from the insertion and withdrawal of the clips. This capability of being turned adds considerably to the life of a socket member, because new surfaces may be presented to the hooked ends I8, where the wear occurs.

It will also be noted that there is considerable space in the large bore portion of the socket member. When the hot tops are stripped from the ingot the hooked portions of the clips often break 01T and remain in the socket members, but owing to the storage capacity of the large bore portions of the latter a considerable number of hook ends may be accommodated before any cleaning out of the socket members becomes.

necessary.

Having thus described my invention, I claim:

1. In a hot top, a casing, a bottom lining member covering the lower end of the casing, a clip for securing said lining member to the casing, and a metallic socket member mounted in said casing having an opening for the reception of said clip, saidsocket member being formed of a material diiTerent from thatof said casing.

2. In a hot top, a casing, a bottom lining member covering the lower end of the casing, a clip for securing said lining member to the casing, and a metallic socket member mounted in said casing having anA opening for the reception of said clip, said socket member having an outer surface that is circular in cross section.

3. In a hot top, a casing having a lower ledge,

a bottom lining member covering the lower surface of said ledge, a clip for securing said member to the casing, and a removable metallic socket member mounted in said casing having an opening for the reception of said clip.

4. In a hot top, a casing, a bottom lining member covering the lower end of said casing, a spring clip for securing said member to the casing, said casing having an opening therethrough near the lower end thereof, a socket member mounted in said opening and provided with a socket for the reception of said clip, and means accessible from the inner side of the casing for securing said socket member in place.

5. In a hot top, a casing, a bottom lining member covering the lower end of said casing, a spring clip for securing said member to the casing, said casing having an opening therethrough near the lower end thereof, and a socket member mounted in said opening, said socket member having a bore therein with a restricted outer end for the reception and retention of said clip.

6. In a hot top, a casing, a bottom lining member covering the lower end of said casing, a spring clip for securing said lining member to the cas.- ing, said casing having` an opening therethrough near the lower end thereof, and aA socket member mounted in` said opening, said socket member having a small bore in its outer end for the reception and. retention of said clip, and anY inner communicating larger bore, said larger bore being of greater length than the small bore.

WALTER M. CHARMAN. 

